How do you find the wireless network key on a desktop computer?

[cmlewis]

Hello, i have a emachine computer. i have wireless network with charter and it keeps dropping. when i call charter they tell me that the router is online but neither of my computers the laptop or the desktop have internet service. What could be the problem

 

[Guest]

http://www.tomshardware.com/forum/31382-43-find-security-password-wireless-router